Mammoth Uncensored Word List:
69 words ending with ip, 12 letters long

aldermanship assessorship attorneyship bachelorship brinkmanship cardinalship chairmanship championship chaplainship coauthorship coeditorship consumership convenership convenorship corporalship corrivalship craftmanship creatureship deemstership dictatorship directorship discipleship examinership executorship followership freshmanship gamesmanship governorship graduateship guardianship helmsmanship horsemanship huntsmanship laureateship listenership marksmanship mediatorship ministership musicianship nonownership overlordship partisanship partizanship preachership prenticeship quaestorship receivership recordership registership relationship residentship retainership salesmanship seigniorship sergeantship serjeantship servitorship sinecureship spinstership superiorship surveyorship survivorship unfriendship virtuosoship viscountship watermanship weatherstrip wordsmanship wranglership